You'll get better at the hill following the advice people have given here. BTW, you'll enjoy it more if you don't try to "force" your way to the top. Alternate standing and spinning. When you are standing, don't stomp on the pedals, just walk on them. When sitting, switch a couple gears lower.

One thing that will help is if you can ride with other people sometimes. If you could see how much you are improving, I think you'd have more fun.